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Using four webcams on a single computer

The other day over the in the vMix User Group on Facebook Mark Schutte asked the following:

Is there a way to get VMIX to work with multiple USB webcams at the 720 or 1080 settings? I’ve been able to get up to four webcams to work only if they are set to lower resolutions. USB 3.1 and USB-C provide more than enough bandwidth but it always gives a USB bandwidth error message when the webcams are set to higher resolutions.

Mark Schutte

Given my long-running exploration of webcams, I felt that I was especially well positioned to address this question. After all, how many people have a collection of such items readily at hand? While I answered in the comment trail on facebook, I think the info is worth sharing here as well.

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NDI-to-HDMI on the cheap?

There is no question that Newtek’s NDI is rocking the world of video production. Whether in corporate video, educational video, live streaming or low-end broadcast, it allows a transition to IP transport that’s profoundly attractive in many ways.

NDI delivers high quality video at very low latency, under one frame of video. A 1080p60 NDI stream requires at most around 150 mbps. This is ideal for production applications, which are quite separate from transmission/delivery, where lower bitrates are preferred and some seconds of delay is tolerable.

ClueCon NDI Feed on Monitor

In the early days of NDI, if you needed to view an NDI signal on a monitor that required a Windows PC running NDI Studio Monitor. This is an application that can pick the stream off the network and display it on a monitor. It has some nice features, like the ability to overlay a second stream (picture-in-picture) and show audio metering.

I used this approach at Cluecon 2018, with a very small PC purchased just for the task (pictured above.)

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Review: Logitech’s Brio 4K Webcam Pro

My how time flies. It hard to believe that I’ve had Logitech’s Brio 4k Webcam Pro in my office for well over a year. While I reported some cursory observations here and here, I’ve yet to give it a proper review…until now.

Brio is Logitech’s first 4K webcam.

As you may recall, I was quite eager to get my hands on a next-generation webcam. I had high hopes for what might be possible using a faster USB 3 connection to the host and a more modern sensor. Brio certainly addresses those areas and more.

My initial evaluation of Brio stalled for quite some time. At that time neither my desktop nor laptop, both a circa 2013, were up to the task of handling 4k video in real-time. While I was using Brio every week, I wasn’t properly able to exercise the little beast.

Happily, the eventual purchase of the Airtop-PC has provided a more than capable host platform. The Airtop has the CPU, GPU and connectivity necessary to cope with 4K video without breaking a sweat. Or making a peep.

Further, as part of my preparations for ClueCon 2018 I upgraded my vMix license to the 4K edition. This gave me both 4K capability and remote control of the PTZ Optics NDI cameras that I rented from Tom Sinclair at Eastern Shore Broadcasting.

Suitably tooled up for the task, I’ve been able to give the little Brio more of a workout in recent months. What follows are my observations from daily use and a series of experiments.

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